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This past Friday night (January 18), Corey Taylor made the following announcement from the stage at Park City Live in Utah: “This is the craziest f***in’ night of my life.”

That’s quite a statement from a guy known for dressing up in a boiler suit, donning a mask that looks like horror film character Leatherface and bellowing vocals on songs titled “The Heretic Anthem” and “Pulse Of The Maggots.”

But the Slipknot and Stone Sour frontman was, for sure, in unusual surroundings Friday, performing Cheap Trick covers, accompanied by Cheap Trick’s Rick Nielsen, along with Nirvana alumni Krist Novoselic (bass), Dave Grohl (drums) and Pat Smear (guitar). The show was part of the celebration around the Grohl-directed documentary, Sound City, following its debut at the Sundance Film Festival.

Taylor tells Radio.com that he’s still digesting the experience. Watch the interview below.

“How did that happen? Somebody please explain that to me! That was awesome though. Being able to get up with Rick Nielsen — and basically Nirvana. Talk about a fanboy-gasm! I was just up there going, ‘What am I doing here?’ But we had a great time. It re-introduced my love for Cheap Trick. I really went deep in the catalog. I thought, ‘This band, they don’t get enough credit.'”

Taylor is currently touring with Stone Sour promoting their House Of Gold And Bones Parts 1 & 2 albums (part 1 is out now, part 2 is due out in April). But he confirms that he’ll be with Grohl’s Sound City Players when they perform at the Hollywood Palladium following the premiere of the film at Los Angeles’ Cinerama Dome on January 31.

Sound City will open for one night only in a number of theaters nationwide on January 31. Check the film’s website for details.